Last name Saidullah (Saidullah 
, سعیداللہ) , worldwide, is a rare surname. The last name Saidullah is habitual in Bahrain, where it is quite a rare surname, Saudi Arabia, where it is a rare surname, and Bangladesh. Not in comparison with a country's population, it is the most numerous in India, Bangladesh, and Saudi Arabia. More prevalently, Saidullah is the forename as well as the last name.